python-pip-wheel package

I noticed today that the "python27" and similar require among others these
packages:
- python-pip-wheel
- python-setuptools-wheel
If you inspect the first one you find this file:
/usr/share/python-wheels/pip-19.0.3-py2.py3-none-any.whl
which appears to be a full "pip" installation. This raises some questions:
1. if "pip" is installed alongside Python, why is it not put into "/usr/bin" or
similar?
2. if "python-pip-wheel" is already installed, what is the point of
"python27-pip" and similar?
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